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KWS™ CI® System Cladding Attachment

Continuous Insulation Should Be Simple To Design + Easy To Install

Attach virtually any cladding or finish over code compliant continuous insulation.

Now approved for use with up to 4″ of high-density stone wool, such as Rockwool Comfortboard 110.

The KNIGHT WALL SYSTEMS™ CI® system provides outstanding thermal performance by way of true CI (continuous insulation), while accommodating nearly any façade or cladding system – providing maximum versatility and durability, with ease of design and installation.

CI system uses unique ¾” deep vertical box girts – called CI-GIRT® – designed to properly disburse the façade loads over exterior rigid insulation – with only unique thermally isolated fasteners penetrating the thermal barrier thus minimizing thermal bridging. It can be installed over most substrates including steel studs, wood studs, CMU and concrete.

For basic, cost-effective horizontal claddings, only a single layer of CI-GIRT® may be needed. For more complex cladding designs or types, choose from a wide variety of KWS™ secondary rails for those panels requiring specific attachment points.

CI system components are produced in standard and custom lengths, in either 16- or 18-gauge Zn-Al-Mg coated steel (standard silver or black PVDF coated) and also available in stainless steel.

This easy to design and even easier to install, engineered drop-in system solution will provide any project with design versatility while still meeting or exceeding North American energy code requirements.

CI system attachment completes the rainscreen envelope design, whether choosing metal panels, lap siding, aluminum composite material (ACM) panels, terra cotta, GFRC, or many more. And choose any brand of insulation meeting minimum compressive strength and code requirements, simplifying design specifications.

View our FREQUENTLY ASKED QUESTIONS for more information.

Advantages to the KWS CI® System Rainscreen:

  • Vertical CI-GIRT® can be spaced 16″, 24″ or 32” O.C. (every other stud)*
  • Support cladding weighing up to 25 PSF*, unlike many other attachments
  • Real labor savings – no notching or cutting of exterior rigid board insulation required like with Z-girts, brackets or clips
  • Thermally isolated fasteners with specially designed ThermaStop™ washers come preassembled
  • Non-combustible steel girt.
  • Highly corrosive-resistant Zn-Al-Mg ZM40 (ASTM A1046) coated steel provides a long service life vs. typical G90 Galvanized steel
  • Black PVDF finish or stainless steel options available, competitively priced
  • Easily installed over any type of substrate – steels studs, wood studs, CMU, concrete, even brick
  • Engineering calculations provide design load compliance for each specific project
  • Attach nearly any type of cladding – supplied by any manufacturer – with easy and efficient detailing and installation
  • Use of any manufacturer’s insulation meeting minimum compressive strength and other code requirements
  • Attach cladding directly to vertical CI-GIRT® or add optional KWS™ horizontal rails (such as PanelRail®)
  • Excellent ventilation with a 3/4-inch minimum continuous rainscreen cavity
  • Pre-engineered and 3rd party tested for proven performance, reliability and durability
  • Competitive, budget conscious assembly that meets ASHRAE 90.1 standard
  • Complete, drop-in rainscreen attachment system – girts, thermally isolated fasteners, rails and engineering – one source liability for the whole system
  • Limited labor and material warranty


  • DEPTH: 0.75″; 1.5″ or custom depths available
  • FINISH: Mill or Black
  • GAUGE: 18-GA or 16-GA – both 50 ksi
  • LENGTH: 120″ Standard or custom lengths available

*Spacing of components varies by project based on project specific conditions. Maximum allowable spacing and dead load (weight of cladding) is based on the total load (dead + live) acting on the assembly and connections. Depending on the system, insulation thickness will influence the systems capacities.

Wall anchors must be specified and supplied by KWS for an extended written limited warranty. KWS will specify the exact anchor type, embedment depth and spacing for anchors in project specific engineering packages. ThermaStop thermal isolation washers must be used on all types of wall anchors with the HCI or CI System, regardless of the substrate.

NOTICE: No freedom from any patent owned by Knight Wall Systems or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer’s use. NO EXPRESS WARRANTIES ARE GIVEN EXCEPT FOR ANY APPLICABLE WRITTEN WARRANTIES SPECIFICALLY PROVIDED BY KNIGHT WALL SYSTEMS. ALL IMPLIED WARRANTIES INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

CI, CI-Girt, MFI, ThermaZee, ThermaBracket, TermGirt and PanelRail are registered trademarks controlled by Knight Wall Systems, Inc. ThermaStop is a trademark of Knight Wall Systems, Inc. Patents US 11,299,891; 11,286,676; 9,856,655; 9,732,518; 9,677,268; 8,429,866 and others pending. This list is not exhaustive and Knight Wall Systems does not waive its rights in regard to other patents or trademarks that are not listed.